Composition and method for the relative freeing and lubricating of engaging surfaces



Patented Sept. 12, 1933 UNITED STATES PATENT OFFICE COMPOSITION METHOD FOR THE RELATIVE FREEING AND LUBRICATING F ENGAGING SURFACES Robert R. Vallee, Philadelphia, Pa., assignor to The Sharples Solvents Corporation, Philadelphia, Pa., a corporation of Delaware No Drawing. Application November 27, 1931 Serial No. 577,717

Claims.

5 pressure.

Engaging surfaces, and particularly metallic surfaces engaging under pressure or subjectto the action of the weather, frequently become relatively immoveable, becoming either wholly immoveable or less readily moveable relatively to one another, such a condition being commonly referred to as a frozen condition. For example, the engaging surfaces of the leaves of springs of vehicles become dried out or rusted and they are less readily moveable than are lubricated or clean leaves or are coherent or coalesced and relatively immoveable, or the engaging threads of nuts and bolts become corroded and thereby coalesced or become jammed and strongly coherent, or pins used in joining or assembling mechanical parts become jammed and coherent or corroded and coalesced.

I have found that amylene dichloride possesses the property of penetrating rapidly into arid substantially throughout very minute spaces, such as the spaces between parts which are frozen or coalesced or strongly coherent. I have found that amylene dichloride possesses this property to a much higher degree than any known lubricant or even kerosene. I have found that when amylene dichloride has so penetrated between such parts it facilitates effective and rapid freeing of such parts and restoration of their relative moveability. I have also found that the penetrating properties of amylene dichloride are so great that lubricating oil mixed therewith will be carried by the amylene dichloride into spaces so small that no known lubricating oil or even kerosene would enter them unless mixed with amylene dichloride, or would not enter them as rapidly.

In the practice of this invention either amylene dichloride alone, or amylene dichloride mixed with varying quantities of lubricating oils preferably of low viscosity, is applied freely to the surfaces to be freed as by introducing it between those surfaces, for example, by applying it to the edge and preferably to all of the edges of the engaging faces of the parts which are frozen or which bind upon one another.

Amylene dichloride which is useful in the practice of this invention is not limited to amylene dichloride of any particular structural formula and an example of amylene dichloride which may be used in the practice of this invention is a commercially available mixture of the following amylene dichlorides:

CCLCHOLCHa 011/ In addition to the penetrating and oil-carrying properties of amylene dichloride above mentioned, amylene dichloride is sufficiently highboiling to remain in effective locations for a suflicient time to enable anyone working to free coherent or coalesced or bound surfaces, to proceed in a workmanlike and careful manner.

The mixture of amylene dichlorides as above mentioned is substantially free of free hydrochloric acid and monochlorides of pentane-and it has a boiling range between approximately 130 C. and 160 C.

When oil is mixed with the amylene dichloride in the practice of this invention such oil will preferably be of low viscosity when the invention is used in connection with the freeing of coherent and coalesced surfaces and particularly surfaces frozen as a result of corrosion, but this invention contemplates the mixture of amylene dichloride with any oil for the purpose of increasing the penetrating power of the oil and carrying the oil into small spaces. The viscosity of the oil employed and the propr-rtions of the final mixture will depend upon the work to be done. If the spaces into which the lubricating oil is to be carried are extremely small, the oil employed is preferably a spindle oil having a Saybolt viscosity of approximately 90 seconds to 130 seconds at 100 F. mixed with amylene dichloride in the proportion of 10 to 90 parts of oil to 90 to 10 parts of amylene dichloride, by volume. If the spaces into which the lubricating oil is to be carried are larger, oils of higher viscosity may be used, or oil may be mixed in larger proportion with the amylene dichloride, or both changes may be made.

While I intend that I shall not be bound by any theory, it is my present belief that the effectiveness of amylene dichloride in the practice of this invention is due to the low surface tension of amylene dichloride, namely, 31 dynes per square centimeter at 25 C. and to the relatively higher boiling point of amylene dichloride as compared with other oil solvents of low surface tension.

After the amylene dichloride, or a mixture thereof with oil, has been applied at the edge or edges of the engaging surfaces of the frozen parts, or, in other words, into or around the crack or crevice between the parts, the usual tools such as wrenches or chisels or drift pins are used in starting the desired relative motion of the parts. A mixture of amylene dichloride and oil is well suited to the lubrication of vehicle springs and other parts engaging under pressure or subject to such infrequent motion that they tend to bind or freeze; and in such cases the mixture is applied as above described.

I claim:

1. An agent for restoring and promoting relative moveability of engaging and coherent and coalesced surfaces, said agent consisting of amylene dichloride and lubricating oil and being in liquid form and having low surface tension and high penetrating power with respect to small openings, substantially as described.

2. In a method for restoring and promoting relative moveability of engaging and coherent and coalesced surfaces, the step comprising introducing amylene dichloride in liquid form between the opposed surfaces.

3. In a method for restoring and promoting relative moveability of engaging and coherent and coalesced surfaces, the step comprising introducing between said surfaces 8. solution of lubricating oil in amylene dichloride.

4. In a method for restoring and promoting relative moveability of engaging and coherent and coalesced surfaces, the steps comprising introducing a solution of lubricating oil in amylene dichloride between said surfaces.

5. A lubricant consisting of a mixture of amylene dichloride and lubricating oil.

ROBERT R. VAILEE. 

